Information communication system using multi-code CDMA mode
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United States of America Patent
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Jul 14, 1998
Grant Date -
N/A
app pub date -
Nov 30, 1995
filing date -
Dec 2, 1994
priority date (Note) -
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Abstract
A system adaptively determines the number of spread codes to use and a type of multi-valued modulation system based on the station of the system. Transmission information is divided into a number of sequences equal to the number of used spread codes. These sequences are error correction encoded, primarily modulated according to a selected one of a plurality of types of multi-valued modulation schemes, secondarily modulated by the selected spread codes, and transmitted.
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